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Abstract

Continually supplied with nutrients, phytoplankton maintained high productivity under ideal illumination and temperature conditions. In situ data in the south part of Cheju Island in the East China Sea (ECS), which has experienced spring blooms since the 2000s were acquired during a research cruise in the spring of 2007. Compared with in situ measurements the MODIS chlorophyll-A (chl-A) products show a high stability in the area. Removing a few error stations data, the correlation between nutrients and chl-A concentration in the study area is examined. The result shows that there is a high positive correlation between silicate and chl-A concentration using regression analysis. MODIS chl-A products and the sea surface temperature (SST) are used to determine the surface silicate distribution. The silicate concentration retrieved from MODIS data show a good agreement with in situ measurements with R2=0.l803, root mean square error (RMSE)=0.326 �¼mol/L (8.23%) and mean absolute error (MAE)=0.925 �¼mol/L (23.38%). These results support previous studies in the same area. MODIS chl-A products and the sea surface temperature (SST) are used to determine the surface silicate distribution. The silicate concentration retrieved from MODIS data show a good agreement with in situ measurements with R2=0.803, root mean square error (RMSE)=0.326 �¼mol/L (8.23%) and mean absolute error (MAE)=0.925 �¼mol/L (23.38%).

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